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Transient infantile hyperthyrotropinaemia. Report of a case
Archives of Disease in Childhood
|December 1, 1979
Summary
Transient hyperthyrotropinemia, a condition of high thyroid-stimulating hormone (TSH), was identified in a newborn via mass screening. This TSH elevation resolved spontaneously by 9 months of age without intervention.
Area of Science:
- Neonatal endocrinology
- Thyroid function testing
- Mass screening programs
Background:
- Neonatal hypothyroidism screening is crucial for early intervention.
- Thyroid-stimulating hormone (TSH) assays are standard for screening.
- Transient conditions can mimic persistent disease.
Observation:
- A term infant presented with elevated serum TSH levels from birth up to 7 months.
- Thyroid hormone levels (T4, T3, free T4, free T3) remained largely within normal ranges.
- A transiently low free T4 level was noted at 7 months.
Findings:
- The case demonstrated transient hyperthyrotropinemia, a temporary increase in TSH.
- Serum TSH normalized spontaneously by 9 months of age.
- The condition occurred in an otherwise healthy infant with normal development.
Implications:
- Transient hyperthyrotropinemia may not require treatment and can resolve naturally.
- Distinguishing transient from permanent hypothyroidism is vital in neonatal screening.
- Further research into the mechanisms and prevalence of transient TSH elevation is warranted.